This is my personal Orthodox configuration, and my daily driver.
Most of the code resides in my userspace, rather than here, as I have multiple keyboards.
make orthodox/rev1:drashna:teensy
All layers have RGB specific indicators, so you can see what layer you're on by the underglow.
Shift, Control and Alt all light up a specific RGB LED for a certain color, based on it's status, adding a visual indicator of OSMs or regular mods are held down.